Thread tensioning means



June 8, 1948. G. o. YOUNG iTHREAD TENSIONING MEANS Filed (kit. 10, 19467 v 5/ i" 3/ 1/5 1/3 5; f0 2621 IN V EN TOR,

leor e 0 'Vouny,

ATTORNEY.

Patented June 8, 1948 "BEES PATENT OFFICEIY 2,442,796 THREAD.TENSIONINGTMEAN S Application October 10, 1946, scriaLNoi 702,511

4 Claims;

My invention relates to knitting machines and it has for-its. object toprovide .a .noveLsimple, resilient thread tensionin'g device over whichthe thread from the beam passesto the thread guides.

A further object is to provide a means for mounting the guide so that itmay be adjusted-to increase or decrease the tensionon the thread as maybefound desirable.

To the attainment of the aforesaid object, the invention resides in thenovel"construction com bination "and arrangement ofparts which willfirst be fully described and then be specifically pointed out in theappended claims, reference being had to the accompanying drawin inwhich:

Fig. 1 is a cross section of a portion of a knitting machine embodyingmy invention,

Fig. 2 is a perspective view of one end of the device.

Fig. 3 is a side elevation of the invention, looking in the direction ofthe arrow in Fig. 2.

Fig. 4 is an elevation and part section of another embodiment of theinvention.

Fig. 5 is a cross section on the line 5-5 of Fig. 4 looking in thedirection of the arrows.

Fig. 6 is a section on theline 55 of Fig. 4 looking in the directionopposite to Fig. 5.

In the drawing in which like numerals and letters of reference indicatelike parts in all the figures, the reference numerals used to indicatethe several parts of the machine are the same as those used to designatethe same parts shown in the drawings of my application for patent on aknitting machine, filed October 15, 1945, Serial Number 622,321, ofwhich application the present application is a continuation in part.

In the drawing I6 designates one of the cross frames of the machine; 8|designates a beam shaft, 80 a beam and T the thread. The thread from thebeam passes around a roller 93 on a shaft 94 and from the roller thethread passes over a bar l2l. The bar is fixed. From the bar the threadpasses over the curved edge 15 of a thin resilient plate 15 The plate153 along its edge opposite the curved edge is securely mounted on afixed rod 13. Passing over the curved edge 15 the thread goes to thethread guide I24.

The thread guide I24 is mounted on a thread guide bar l2l which isattached to the threadguide-bar-carrying arm 10. able along a collar 68of a fixed shaft 66 but is prevented from turning on the collar by meansof grooves and splines 69.

I41 designates a hollow shaft which connects the end and intermediateframes 16 together.

The roller 93 hereinbefore referred to has its The arm I0 is mov- 2shaft 94 journalled in the short arm of ;a bell crank-lever 89, the-long arm of which has a roller '1 l 5 that is-held--to engage a-cam II3 by means of a spri-ngi H; The cam 1 I3 is mounted on a suitablydriven rotatable shaft 55: The shaft "55 has an eccentric-"56for-the--strap;-58 whose, arm -51 -is pivoted-at 59 tea-rod 5|- thatreciprocates pina -beari-ng-bore in -a.--fixedshaft 50.: The -rod-5l hasa head*52-that-carries--a sinker-nib bar -53 "on which a -sinker nibSt-is mounted to cooperate with the fixedly mounted sinker 49 thatisattached to a fixed sinkerbar 48.

20 is a vertically reciprocal shaft or rod which has a head 2| on whicha needle bar 22 is fixedly secured and in which a rod 21 is reciprocallymounted. The rod 21 carries a tongue bar 26 on which theneedle-hook-closing tongue 33 is mounted. The needle 24 is mounted onthe needle bar 22. The rod 21 is spring-pressed against a fixed cam 32which is mounted on a bar 3| and operates the hook closing tongue as therod 20 1 works up and down to open and close respectively the needlehook.

From the thread guide I24 the thread passes to the needle while the knitfabric passes over a roller H8 to a winding up roller (not shown).

The rotation of the shaft 55 and the reciprocations of the rod 20 aretimed to effect knitting operations during which the thread T is let offthe beam by the action of the cam H3 on the roller I I5, the resilientplate l5 taking the place of the usual spring-loaded tension rodsheretofore employed in tricot machines to take care of slight variationsin the thread tensions.

By using a single plate 15 the use of a spring tensioned rod is avoidedand a more uniform action is provided for than can be had by a pivotedtension bar such as heretofore used.

In the embodiment shown in Figs. 4 to 6 inclusive, the rod I3 whichcarries the resilient plate 15 has an end I3 mounted eccentrically in asocket 13 or a rotatable body 13 whose threaded stud l3 passes through abearing hole in the frame w and carries a clamp nut (-3 and a squaredwrench-receiving portion 13 The end 13* is held from turning in thesocket 13 by a key 13 and set screw 13 The plate i5 in this embodimentis curved about the shaft 13 and has one edge fastened to the shaft byscrews 15 The thread passes over the plate I5 as indicated by the brokenline T in Fig. 6, and the arrangement is such that as the stud 13 isturned the rod 13 will be swung about the axis of the lug I3 and theamount of tension on the thread itself will be increased or decreaseddepending upon the point of contact with the thread on the curved plate.Due to the eccentric arrangement, the angle from the end of the tensionplate to the hole in the thread guide (not shown) will remainapproximately the same, which is very important in some cases. The rod73 with plate l5 may be mounted in the body 13 in lieu of the rod '13 ifdesired.

In this application I make no claim to the mechanism shown in Fig. 1other than the elements 13, 15, 15 as such constitute in general thesubject matter of my original application, Serial Number 622,321,aforesaid.

From the foregoing description taken in connection with the accompanyingdrawing it is believed my invention and its advantages will be readilyunderstood by those skilled in the art.

What I claim is:

1. In a knitting machine having a beam and thread guides, theimprovement which comprises a resilient thread-tensioning plate rigidlymounted at one longitudinal side and free at the other end over whichthe thread from the beam passes to the thread guides, said plateextending over the full operating width of the machine, said resilienttension plate being mounted on a rod which in turn is carried by a bodyjou-rnalled eccentrically with respect to said rod and having means tohold said rod and plate in any desired adjusted position.

2. In a knitting machine having a beam, thread Number.

4 guide and thread let-ofl mechanism, the improvement which comprises afixed rod, a resilient thread-tensioning plate mounted along one of itslongitudinal edges on said rod and having its other longitudinal edgecurved around said rod and spaced from the same, the thread from thebeam let-01f mechanism passing over said other longitudinal edge to thethread guide.

3. In a knitting machine having a beam and a thread guide, theimprovement which includes a body having a rotatably adjustably mountedstud and an eccentric socket, arod secured in said socket and a threadtensioning plate secured adjacent one longitudinal edge to said rod.

4. In a knitting machine having a beam and a thread guide, theimprovement which includes a body having a rotatably adjustably mountedstud and an eccentric socket, a rod secured in said socket and a threadtensioning plate secured adjacent one longitudinal edge to said rod andcurved about and spaced from said rod save where it is secured to therod.

GEORGE OSTROM YOUNG.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Name Date 2,308,430 Bolden et a1. Jan. 12, 1943

